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Re: Tank treads and specialty wheels
Posted by Jim Meyer at 02/26/2001 8:24 AM EST
Engineer on team #67, HOT Team, from Huron Valley Schools and GM Milford Proving Ground. In Reply to: Tank treads and specialty wheels Posted by Justin Rolnick on 02/24/2001 11:04 PM EST: : I am the captain of a rookie team. I would like to know where the teams who use tank treads get them or how they make them. I would also like to know where the teams with special traction wheels get them. A few tank treads are double sided timing belt. Some, like the Techno-Cart, appear to use small metal plates fastened to a roller chain. I have no idea how the super wide tracks on a robot in the gallery were made. Double sided timing belt is available because it is on the additional hardware list. You are allowed 20' of this stuff, from any source you can find, as long as they don't custom make it specially for you. I'm sure you already know this, but stuff in the additional hardware list can cost as much as you can afford to pay. Custom wheels are typically made from materials on the additional hardware list. We made ours mostly from 1/4" thick aluminum plate. Once these custom wheels are made the teams usually wrap some sort of traction material around them. I have seen some teams use timing belt with the toothed side out for this. Our custom wheels were built on a CNC mill. The students did most of the work but they worked very closely with an experienced machinist. You could make a simpler version from wood by using a circle cutter to cut a bunch of disks from plywood and then gluing them together to make a wheel. Team 122 had very cool wood wheels last year. I hope this helps, Jim |
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